Coat of arms of the Polish–Lithuanian Commonwealth

Coat of arms of the Polish-Lithuanian Commonwealth
Arms during the reign of Sigismund III
ArmigerKing of Poland and Grand Duke of Lithuania
AdoptedFollowing 1386
ShieldQuarterly 1st and 4th Gules, an eagle argent, crowned or; 2nd and 3rd, Gules, Pogonia.

The coat of arms of the Polish–Lithuanian Commonwealth represented the union of the Crown of the Polish Kingdom and Grand Duchy of Lithuania.

While the coat of arms remained mostly unchanged throughout the Commonwealth's tenure, as different kings were elected it would be defaced with their personal arms and other features, such as the Order of the Golden Fleece (when the armiger was a member) or the Order of the White Eagle for later kings.